The invention discloses a horizontal pushing wedged clamping device, and belongs to the field of tester clamps. An execution mechanism of the horizontal pushing wedged clamping device is composed of wedge block bodies and wedge blocks; during testing, the wedge block bodies and a clamp body are stressed; the front end of each wedge block body is a wedged mechanism, so that clamping force can be strengthened as drawing force applied to a sample is strengthened, the sample is not liable to slip, and clamping implemented to the sample is reliable; and meanwhile, operation is simple and convenient, a clamping range is larger than that of a wedged clamp, and in addition, the wedged blocks clamp the sample in a translation manner without any axial additional force. According to the technical scheme, the horizontal pushing wedged clamping device has the advantages that by taking compressed air as a power source, a medium is clean, energy supply is convenient, clamping and loosening are rapid, the test time is short, the working efficiency is high, the labor intensity is low, and the like, and also has various advantages that the initial clamping force is small, the sample can be asymmetrically clamped, and the like. By adopting the device, the tester industry goes up to a new stage, automation of a clamping process can be further realized at the same time, the controllability is strengthened, and a solid foundation is laid for further realizing full automation of material tests.